Matter 6: Question Preview (ID: 7966)

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What does a subscript describe in a molecular formula?
a) How many molecules are present
b) How many of a particular element are in a molecule
c) How many bonds are formed in a molecule
d) How large the electric charge on an atom or molecule

All compounds are molecules, but not all molecules are compounds. This statement is...
a) True
b) False

Which term refers to the molecules that are present before a chemical reaction occurs?
a) Reactants
b) Products
c) Compound
d) Synthetics

Which of the following pairs is most likely to form an ionic bond?
a) H and H
b) S and O
c) Ca and Cl
d) N and O

Which of the following pairs will create the strongest atomic bond?
a) Li and F
b) Ca and Cl
c) O and O
d) H and H

How many valence electrons are there on an Oxygen atom?
a) 1
b) 2
c) 6
d) 7

A chemical reaction starts with 2 H2 and O2. According to the Law of Conservation of Mass, how many hydrogen and oxygen should be in the product?
a) 2 Hydrogen and 2 Oxygen
b) 4 Hydrogen and 2 Oxygen
c) 2 Hydrogen and 4 Oxygen
d) 4 Hydrogen and 4 Oxygen

What coefficients would balance this equation? ___ C + ___ O2 --> ___ CO
a) 1, 1, 1
b) 2, 1, 2
c) 1, 2, 1
d) 1, 1, 2

What coefficients would balance this equation? ___Fe + ___ H2O --> ___ H2 + ___ Fe3O4
a) 3, 1, 1, 1
b) 1, 2, 1, 1
c) 3, 2, 2, 1
d) 3, 4, 4, 1

What coefficients would balance this equation? ___ C12H26 + ___ O2 --> ___ CO2 + ___ H2O
a) 2, 37, 24, 26
b) 1, 4, 12, 13
c) 3, 72, 36, 39
d) 1, 50, 12, 13

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